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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2020	Apr. 17, 2020
Document and Entity Information [Abstract]
Entity Current Reporting Status	Yes
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2020
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2020
Entity Registrant Name	BankFinancial CORP
Entity Central Index Key	0001303942
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Common Stock, Shares Outstanding		15,042,268
Entity Shell Company	false

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets
Cash and due from other financial institutions	$ 14,652	$ 9,785
Interest-bearing deposits in other financial institutions	155,286	180,540
Cash and cash equivalents	169,938	190,325
Securities, at fair value	63,853	60,193
Loans receivable, net of allowance for loan losses: March 31, 2020, $8,112 and December 31, 2019, $7,632	1,147,628	1,168,008
Other real estate owned, net	110	186
Stock in Federal Home Loan Bank (FHLB) and Federal Reserve Bank (FRB), at cost	7,490	7,490
Premises and equipment, net	24,202	24,346
Accrued interest receivable	4,698	4,563
Bank-owned life insurance	18,977	18,945
Deferred taxes	3,644	3,873
Other assets	9,742	10,086
Total assets	1,450,282	1,488,015
Deposits
Noninterest-bearing	211,142	210,762
Interest-bearing	1,042,609	1,073,995
Total deposits	1,253,751	1,284,757
Borrowings	0	61
Advance payments by borrowers for taxes and insurance	8,169	10,222
Accrued interest payable and other liabilities	15,367	18,603
Total liabilities	1,277,287	1,313,643
Commitments and contingent liabilities
Stockholders’ equity
Preferred Stock, $0.01 par value, 25,000,000 shares authorized, none issued or outstanding	0	0
Common Stock, $0.01 par value, 100,000,000 shares authorized; 15,072,268 shares issued at March 31, 2020 and 15,278,464 shares issued at December 31, 2019	151	153
Additional paid-in capital	110,220	112,420
Retained earnings	62,469	61,573
Accumulated other comprehensive income	155	226
Total stockholders’ equity	172,995	174,372
Total liabilities and stockholders’ equity	$ 1,450,282	$ 1,488,015

Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for loan losses	$ 8,112	$ 7,632
Preferred Stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred Stock, shares authorized	25,000,000	25,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value (usd per share)	$ 0.01	$ 0.01
Common Stock, shares authorized	100,000,000	100,000,000
Common Stock, shares issued	15,072,268	15,278,464

Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest and dividend income
Loans, including fees	$ 13,611	$ 15,352
Securities	304	602
Other	738	572
Total interest income	14,653	16,526
Interest expense
Deposits	2,684	3,221
Borrowings	0	86
Borrowings	2,684	3,307
Net interest income	11,969	13,219
Provision for (recovery of) loan losses	(471)	87
Net interest income after provision for (recovery of) loan losses	11,498	13,306
Noninterest income
Income from product and service	887	930
Loan servicing fees	63	23
Mortgage brokerage and banking fees	29	28
Gain on sale of equity securities		295
Gross gains	0	295
Loss on disposal of other assets		(19)
Gain (Loss) on Disposition of Other Assets	(2)	(19)
Trust and insurance commissions and annuities income	282	205
Earnings on bank-owned life insurance	(32)	(30)
Other	107	132
Total noninterest income	1,398	1,624
Noninterest expense
Compensation and benefits	5,518	5,703
Office occupancy and equipment	1,800	1,845
Advertising and public relations	152	161
Information technology	822	692
Professional Fees	263	306
Supplies, telephone, and postage	300	399
Amortization of intangibles	14	20
Nonperforming asset management	40	54
Operations of other real estate owned, net	(17)	(44)
FDIC insurance premiums	34	108
Other	702	854
Total noninterest expense	9,628	10,098
Income before income taxes	3,268	4,832
Income tax expense	850	1,281
Net income	$ 2,418	$ 3,551
Basic earnings per common share (usd per share)	$ 0.16	$ 0.22
Weighted average common shares outstanding (shares)	15,205,731	16,202,303

Consolidated Statements Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net income	$ 2,418	$ 3,551
Unrealized holding gain (loss) arising during the period	(97)	6
Tax effect	26	(1)
Net of tax	(71)	5
Comprehensive income	2,347	3,556
Retained Earnings [Member]
Net income	$ 2,418	$ 3,551

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

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+ Details

Consolidated Statements of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2018	$ 187,150	$ 165	$ 130,547	$ 56,167	$ 271
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,551			3,551
Other comprehensive loss, net of tax					5
Repurchase and retirement of common stock	(12,840)	(8)	(12,832)
Cash dividends declared on common stock	(1,646)			(1,646)
Ending Balance at Mar. 31, 2019	176,220	157	117,715	58,072	276
Beginning Balance at Dec. 31, 2019	174,372	153	112,420	61,573	226
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,418			2,418
Other comprehensive loss, net of tax					(71)
Repurchase and retirement of common stock	(2,202)	(2)	(2,200)
Cash dividends declared on common stock				(1,522)
Ending Balance at Mar. 31, 2020	$ 172,995	$ 151	$ 110,220	$ 62,469	$ 155

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

+ Details

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Cash dividends declared on common stock (in dollars per share)	$ 0.10	$ 0.10
Repurchase and retirement of common stock (in shares)	837,015	206,196

Consolidated Statements of Cash Flow - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net income	$ 2,418	$ 3,551
Adjustments to reconcile to net income to net cash from operating activities
Provision for (recovery of) loan losses	(471)	87
Depreciation	403	391
Amortization of premiums and discounts on securities and loans	1	1
Amortization of intangibles	14	20
Amortization of servicing assets	15	17
Net change in net deferred loan origination costs	64	7
Gain on sale of other real estate owned	(30)	(95)
Gain on sale of equity securities	0	(295)
Loss on disposal of other assets	2	19
Earnings on bank-owned life insurance	(32)	(30)
Net change in:
Accrued interest receivable	(135)	(459)
Other assets	708	1,293
Accrued interest payable and other liabilities	(3,336)	(3,991)
Net cash from operating activities	563	342
Securities
Proceeds from maturities	23,188	30,974
Proceeds from principal repayments	810	449
Proceeds from sale of equity securities	0	3,722
Purchases of securities	(27,756)	(26,479)
Net decrease in loans receivable	19,818	17,325
Proceeds from sale of other real estate owned	95	446
Purchase of premises and equipment, net	(261)	(197)
Net cash from investing activities	15,894	26,240
Cash flows from financing activities
Net change in deposits	(31,006)	(25,738)
Net change in borrowings	(61)	(4,943)
Net change in advance payments by borrowers for taxes and insurance	(2,053)	(1,397)
Payments for Repurchase of Common Stock	(2,202)	(12,840)
Payments of Ordinary Dividends, Common Stock	(1,522)	(1,646)
Net cash used in financing activities	(36,844)	(46,564)
Net change in cash and cash equivalents	(20,387)	(19,982)
Beginning cash and cash equivalents	190,325	98,204
Ending cash and cash equivalents	169,938	78,222
Supplemental disclosures of cash flow information:
Interest paid	2,683	3,453
Income taxes paid	65	375
Loans transferred to other real estate owned	0	$ 46
Recording of right of use asset in exchange for lease obligations in other assets and other liabilities	$ 111

Summary of Significant Accounting Policies (Notes)	3 Months Ended
Summary of Significant Accounting Policies (Notes)	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	Basis of Presentation: BankFinancial Corporation, a Maryland corporation headquartered in Burr Ridge, Illinois, is the owner of all of the issued and outstanding capital stock of BankFinancial, National Association (the “Bank”). The interim unaudited consolidated financial statements include the accounts and transactions of BankFinancial Corporation, the Bank, and the Bank’s wholly-owned subsidiaries, Financial Assurance Services, Inc. and BFIN Asset Recovery Company, LLC (collectively, “the Company”), and reflect all normal and recurring adjustments that are, in the opinion of management, considered necessary for a fair presentation of the financial condition and results of operations for the periods presented. Such adjustments are the only adjustments reflected in the accompanying financial statements. All significant intercompany accounts and transactions have been eliminated. The results of operations for the three month period ended March 31, 2020 is not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2020 or for any other period. Certain information and note disclosures normally included in financial statements prepared in conformity with accounting principles generally accepted in the United States of America (“US GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission. Use of Estimates: The preparation of the consolidation financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Although these estimates and assumptions are based on the best available information, actual information, actual results could differ from those estimates. COVID-19: The Company has evaluated subsequent events for potential recognition and/or disclosure through the date the unaudited consolidated financial statements included in this Quarterly Report on Form 10-Q were issued. On March 11, 2020, the World Health Organization declared the outbreak of a novel coronavirus (“COVID-19”) as a global pandemic, which continues to spread throughout the United States and around the world. The declaration of a global pandemic indicates that almost all public commerce and related business activities must be, to varying degrees, curtailed with the goal of decreasing the rate of new infections. The outbreak of COVID-19 could adversely impact a broad range of industries in which the Company’s customers operate and impair their ability to fulfill their financial obligations to the Company. On March 3, 2020, the Federal Open Market Committee reduced the target federal funds rate by 50 basis points to 1.00% to 1.25%. This rate was further reduced to a target range of 0% to 0.25% on March 16, 2020. These reductions in interest rates and other effects of the COVID-19 outbreak may adversely affect the Company’s financial condition and results of operations. As a result of the spread of the COVID-19 coronavirus, economic uncertainties have arisen which are likely to negatively impact net interest income and noninterest income. Other financial impact could occur though such potential impact is unknown at this time. Reclassifications: Certain reclassifications have been made in the prior period’s financial statements to conform them to the current period’s presentation. These unaudited consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, as filed with the Securities and Exchange Commission. Newly Issued Not Yet Effective Accounting Standards In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). These amendments require the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. Many of the loss estimation techniques applied today will still be permitted, although the inputs to those techniques will change to reflect the full amount of expected credit losses. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. For SEC filers who are smaller reporting companies, ASU 2016-13 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022.

Earnings Per Share (Notes)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Amounts reported in earnings per share reflect earnings available to common stockholders for the period divided by the weighted average number of shares of common stock outstanding during the period.



	Three Months Ended March 31,
	2020		2019
Net income available to common stockholders	$	2,418	$	3,551
Basic and diluted weighted average common shares outstanding	15,205,731		16,202,303
Basic and diluted earnings per common share	$	0.16	$	0.22

Securities (Notes)

3 Months Ended

Mar. 31, 2020

Investments, Debt and Equity Securities [Abstract]

SECURITIES

The fair value of securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income is as follows:



	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-Sale Securities
March 31, 2020
Certificates of deposit	$	53,234	$	—	$	—		$	53,234
Municipal securities	505		6		—			511
Mortgage-backed securities - residential	7,062		237		—			7,299
Collateralized mortgage obligations - residential	2,840		3		(34		)	2,809
	$	63,641	$	246	$	(34	)	$	63,853
December 31, 2019
Certificates of deposit	$	48,666	$	—	$	—		$	48,666
Municipal securities	505		8		—			513
Mortgage-backed securities - residential	7,727		310		—			8,037
Collateralized mortgage obligations - residential	2,986		4		(13		)	2,977
	$	59,884	$	322	$	(13	)	$	60,193

The mortgage-backed securities and collateralized mortgage obligations reflected in the preceding table were issued by U.S. government-sponsored entities or agencies, Freddie Mac, Fannie Mae and Ginnie Mae, and are obligations which the government has affirmed its commitment to support.

The amortized cost and fair values of securities by contractual maturity are shown below. Securities not due at a single maturity date are shown separately. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.



	March 31, 2020
	Amortized Cost		Fair Value
Due in one year or less	$	53,335	$	53,335
Due after one year through five years	404		410
	53,739		53,745
Mortgage-backed securities - residential	7,062		7,299
Collateralized mortgage obligations - residential	2,840		2,809
	$	63,641	$	63,853

Investment securities with carrying amounts of $1.5 million and $2.0 million at March 31, 2020 and December 31, 2019, respectively, were pledged as collateral on customer repurchase agreements and for other purposes as required or permitted by law.

Sales of equity securities were as follows:



	Three Months Ended March 31,
	2020		2019
Proceeds	$	—	$	3,722
Gross gains	—		295
Gross losses	—		—

Securities with unrealized losses not recognized in income are as follows:



	Less than 12 Months							12 Months or More							Total
	Count		Fair Value		Unrealized Loss			Count		Fair Value		Unrealized Loss			Count	Fair Value		Unrealized Loss
March 31, 2020
Collateralized mortgage obligations - residential	$	2	$	623	$	(2	)	$	3	$	1,941	$	(32	)	5	$	2,564	$	(34	)

December 31, 2019
Collateralized mortgage obligations - residential	3		$	1,566	$	(10	)	1		$	937	$	(3	)	4	$	2,503	$	(13	)

The Company evaluates marketable investment securities with significant declines in fair value on a quarterly basis to determine whether they should be considered other-than-temporarily impaired under current accounting guidance, which generally provides that if a marketable security is in an unrealized loss position, whether due to general market conditions or industry or issuer-specific factors, the holder of the securities must assess whether the impairment is other-than-temporary.

Certain collateralized mortgage obligations that the Company holds in its investment portfolio were in an unrealized loss position at March 31, 2020, but the unrealized losses were not considered significant under the Company’s impairment testing methodology. In addition, the Company does not intend to sell these securities, and it is likely that the Company will not be required to sell these securities before their anticipated recovery occurs.

The Bank, as a member of Visa USA, received 51,404 unrestricted shares of Visa, Inc. Class B common stock in connection with Visa, Inc.’s initial public offering in 2007 and a related retroactive responsibility plan. The retroactive responsibility plan obligates all former Visa USA members to indemnify Visa USA, in proportion to their equity interests in Visa USA, for certain litigation losses and expenses, including settlement expenses, for the lawsuits covered by the retrospective responsibility plan. Due to the restrictions that the retrospective responsibility plan imposes on the Company’s Visa, Inc. Class B shares, the Company had not recorded the Class B shares as an asset.

The Bank sold 25,702 shares of Visa Class B common stock in the fourth quarter of 2018 and the remaining 25,702 shares of Visa Class B common stock in the first quarter of 2019 and recorded a gain of $295,000.

Loans Receivable (Notes)

3 Months Ended

Mar. 31, 2020

Receivables [Abstract]

Loans Receivable

Loans receivable are as follows:



	March 31, 2020			December 31, 2019
One-to-four family residential real estate	$	52,849		$	55,750
Multi-family mortgage	542,421			563,750
Nonresidential real estate	133,432			134,674
Commercial loans	158,049			145,714
Commercial leases	266,063			272,629
Consumer	2,078			2,211
	1,154,892			1,174,728
Net deferred loan origination costs	848			912
Allowance for loan losses	(8,112		)	(7,632		)
Loans, net	$	1,147,628		$	1,168,008

The following tables present the balance in the allowance for loan losses and loans receivable by portfolio segment and based on impairment method:



	Allowance for loan losses						Loan Balances
	Individually evaluated for impairment		Collectively evaluated for impairment		Total		Individually evaluated for impairment		Collectively evaluated for impairment		Total
March 31, 2020
One-to-four family residential real estate	$	—	$	682	$	682	$	1,826	$	51,023	$	52,849
Multi-family mortgage	—		3,869		3,869		612		541,809		542,421
Nonresidential real estate	—		1,460		1,460		288		133,144		133,432
Commercial loans	—		1,275		1,275		—		158,049		158,049
Commercial leases	—		780		780		88		265,975		266,063
Consumer	—		46		46		—		2,078		2,078
	$	—	$	8,112	$	8,112	$	2,814	$	1,152,078	1,154,892
Net deferred loan origination costs											848
Allowance for loan losses											(8,112		)
Loans, net											$	1,147,628



	Allowance for loan losses						Loan Balances
	Individually evaluated for impairment		Collectively evaluated for impairment		Total		Individually evaluated for impairment		Collectively evaluated for impairment		Total
December 31, 2019
One-to-four family residential real estate	$	—	$	675	$	675	$	1,835	$	53,915	$	55,750
Multi-family mortgage	—		3,676		3,676		620		563,130		563,750
Nonresidential real estate	—		1,176		1,176		288		134,386		134,674
Commercial loans	—		1,308		1,308		—		145,714		145,714
Commercial leases	—		757		757		—		272,629		272,629
Consumer	—		40		40		—		2,211		2,211
	$	—	$	7,632	$	7,632	$	2,743	$	1,171,985	1,174,728
Net deferred loan origination costs											912
Allowance for loan losses											(7,632		)
Loans, net											$	1,168,008

The following table represents the activity in the allowance for loan losses by portfolio segment:



	One-to-four family residential real estate			Multi-family mortgage		Non-residential real estate			Construc-tion and land			Commer-cial loans			Commer-cial leases			Consumer			Total
March 31, 2020
Allowance for loan losses:
Beginning balance	$	675		$	3,676	$	1,176		$	—		$	1,308		$	757		$	40		$	7,632
Provision for (recovery of) loan losses	(1		)	181		284			—			(35		)	23			19			471
Loans charged off	(5		)	—		—			—			—			—			(13		)	(18		)
Recoveries	13			12		—			—			2			—			—			27
Total ending allowance balance	$	682		$	3,869	$	1,460		$	—		$	1,275		$	780		$	46		$	8,112

March 31, 2019
Allowance for loan losses:
Beginning balance	699			3,991		1,476			4			1,517			755			28			$	8,470
Provision for (recovery of) loan losses	(44		)	80		39			(1		)	(97		)	(65		)	1			(87		)
Loans charged off	(23		)	—		(28		)	—			—			—			(5		)	(56		)
Recoveries	17			8		—			—			2			—			—			27
Total ending allowance balance	$	649		$	4,079	$	1,487		$	3		$	1,422		$	690		$	24		$	8,354

Impaired loans

The following tables present loans individually evaluated for impairment by class of loans:



									Three months ended March 31, 2020
	Loan Balance		Recorded Investment		Partial Charge-off		Allowance for Loan Losses Allocated		Average Investment in Impaired Loans		Interest Income Recognized
March 31, 2020
With no related allowance recorded:
One-to-four family residential real estate	$	2,162	$	1,826	$	346	$	—	$	1,845	$	12
Multi-family mortgage - Illinois	612		612		—		—		616		9
Nonresidential real estate	280		288		—		—		288		—
Other commercial leases	96		88		—		—		50		2
	$	3,150	$	2,814	$	346	$	—	$	2,799	$	23



									Year ended December 31, 2019
	Loan Balance		Recorded Investment		Partial Charge-off		Allowance for Loan Losses Allocated		Average Investment in Impaired Loans		Interest Income Recognized
December 31, 2019
With no related allowance recorded:
One-to-four family residential real estate	$	2,168	$	1,835	$	339	$	—	$	2,208	$	51
Multi-family mortgage - Illinois	620		620		—		—		637		37
Nonresidential real estate	280		288		—		—		589		2
	$	3,068	$	2,743	$	339	$	—	$	3,434	$	90

Nonaccrual Loans

The following tables present the recorded investment in nonaccrual and loans 90 days or more past due still on accrual by class of loans:



	Loan Balance		Recorded Investment		Loans Past Due Over 90 Days, Still Accruing
March 31, 2020
One-to-four family residential real estate	$	500	$	476	$	—
Nonresidential real estate	280		288		—
	$	780	$	764	$	—
December 31, 2019
One-to-four family residential real estate	$	598	$	512	$	—
Nonresidential real estate	280		288		—
Investment-rated commercial leases	47		—		47
	$	925	$	800	$	47

Nonaccrual loans and impaired loans are defined differently. Some loans may be included in both categories, and some loans may only be included in one category. Nonaccrual loans include both smaller balance homogeneous loans that are collectively evaluated for impairment and individually classified impaired loans.

The Company’s reserve for uncollected loan interest was $94,000 and $81,000 at March 31, 2020 and December 31, 2019, respectively. When a loan is on nonaccrual status and the ultimate collectability of the total principal of an impaired loan is in doubt, all payments are applied to principal under the cost recovery method. Alternatively, when a loan is on nonaccrual status but there is doubt concerning only the ultimate collectability of interest, contractual interest is credited to interest income only when received, under the cash basis method pursuant to the provisions of FASB ASC 310–10, as applicable. In all cases, the average balances are calculated based on the month–end balances of the financing receivables within the period reported pursuant to the provisions of FASB ASC 310–10, as applicable.

Past Due Loans

The following tables present the aging of the recorded investment of loans by class of loans:



	30-59 Days Past Due		60-89 Days Past Due		90 Days or Greater Past Due		Total Past Due		Loans Not Past Due		Total
March 31, 2020
One-to-four family residential real estate loans:
Owner occupied	$	657	$	—	$	472	$	1,129	$	41,651	$	42,780
Non-owner occupied	131		—		—		131		9,938		10,069
Multi-family mortgage:
Illinois	1,258		—		—		1,258		233,404		234,662
Other	—		—		—		—		307,759		307,759
Nonresidential real estate	—		—		288		288		133,144		133,432
Commercial loans:
Regional commercial banking	—		—		—		—		23,704		23,704
Health care	—		—		—		—		54,806		54,806
Direct commercial lessor	—		—		—		—		79,539		79,539
Commercial leases:
Investment-rated commercial leases	5,109		—		—		5,109		119,342		124,451
Other commercial leases	4,093		443		—		4,536		137,076		141,612
Consumer	7		7		—		14		2,064		2,078
	$	11,255	$	450	$	760	$	12,465	$	1,142,427	$	1,154,892



	30-59 Days Past Due		60-89 Days Past Due		90 Days or Greater Past Due		Total Past Due		Loans Not Past Due		Total
December 31, 2019
One-to-four family residential real estate loans:
Owner occupied	$	777	$	340	$	507	$	1,624	$	43,365	$	44,989
Non-owner occupied	280		15		—		295		10,466		10,761
Multi-family mortgage:
Illinois	981		302		—		1,283		246,680		247,963
Other	—		—		—		—		315,787		315,787
Nonresidential real estate	—		—		288		288		134,386		134,674
Commercial loans:
Regional commercial banking	—		—		—		—		24,853		24,853
Health care	—		—		—		—		70,430		70,430
Direct commercial lessor	—		—		—		—		50,431		50,431
Commercial leases:
Investment-rated commercial leases	826		—		47		873		132,966		133,839
Other commercial leases	543		136		—		679		138,111		138,790
Consumer	24		37		—		61		2,150		2,211
	$	3,431	$	830	$	842	$	5,103	$	1,169,625	$	1,174,728

Troubled Debt Restructurings

Section 4013 of the Coronavirus Aid, Relief and Economic Security Act (CARES Act) provides that a qualifying loan modification or extension is exempt by law from classification as a Troubled Debt Restructuring ("TDR") pursuant to FASB ASC 340-10. In addition, OCC Bulletin 2020-35 provides more limited circumstances in which a loan modification or extension is not subject to classification as a TDR pursuant to FASB ASC 340-10.

The Company evaluates loan extensions or modifications not qualified under Section 4013 of the CARES Act or under OCC Bulletin 2020-35 in accordance with FASB ASC 340-10 with respect to the classification of the loan as a TDR.

Under ASC 340-10, if the Company grants a loan extension or modification to a borrower experiencing financial difficulties for other than an insignificant period of time that includes a below–market interest rate, principal forgiveness, payment forbearance or other concession intended to minimize the economic loss to the Company, the loan extension or loan modification is classified as a TDR. In cases where borrowers are granted new terms that provide for a reduction of either interest or principal then due and payable, management measures any impairment on the restructured loan in the same manner as for impaired loans as noted above.

The Company had no TDRs at March 31, 2020 and December 31, 2019. During the three months ended March 31, 2020 and 2019, there were no loans modified and classified as TDRs. A loan is considered to be in payment default once it is 90 days contractually past due under the modified terms.

To determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification. This evaluation is performed under the Company’s internal underwriting policy.

Credit Quality Indicators

The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt, including current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans individually by classifying the loans based on credit risk. This analysis includes non-homogeneous loans, such as commercial and commercial real estate loans. This analysis is performed on a monthly basis. The Company uses the following definitions for risk ratings:

Special Mention. A Special Mention asset has potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the institution’s credit position at some future date. Special Mention assets are not adversely classified and do not expose an institution to sufficient risk to warrant adverse classification.

Substandard. Loans categorized as Substandard continue to accrue interest, but exhibit a well-defined weakness or weaknesses that may jeopardize the liquidation of the debt. The loans continue to accrue interest because they are well secured and collection of principal and interest is expected within a reasonable time. The risk rating guidance published by the Office of the Comptroller of the Currency clarifies that a loan with a well-defined weakness does not have to present a probability of default for the loan to be rated Substandard, and that an individual loan’s loss potential does not have to be distinct for the loan to be rated Substandard.

Nonaccrual. An asset classified Nonaccrual has all the weaknesses inherent in one classified Substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable.

Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered “Pass” rated loans.

Based on the most recent analysis performed, the risk categories of loans by class of loans are as follows:



	Pass		Special Mention		Substandard		Nonaccrual		Total
March 31, 2020
One-to-four family residential real estate loans:
Owner occupied	$	41,815	$	83	$	406	$	476	$	42,780
Non-owner occupied	10,006		29		34		—		10,069
Multi-family mortgage:
Illinois	234,662		—		—		—		234,662
Other	307,759		—		—		—		307,759
Nonresidential real estate	132,894		161		89		288		133,432
Commercial loans:
Regional commercial banking	23,704		—		—		—		23,704
Health care	53,863		943		—		—		54,806
Direct commercial lessor	79,539		—		—		—		79,539
Commercial leases:
Investment-rated commercial leases	124,451		—		—		—		124,451
Other commercial leases	139,882		307		1,423		—		141,612
Consumer	2,059		10		9		—		2,078
	$	1,150,634	$	1,533	$	1,961	$	764	$	1,154,892



	Pass		Special Mention		Substandard		Nonaccrual		Total
December 31, 2019
One-to-four family residential real estate loans
Owner occupied	$	43,908	$	36	$	533	$	512	$	44,989
Non-owner occupied	10,696		30		35		—		10,761
Multi-family mortgage:
Illinois	247,757		—		206		—		247,963
Other	315,787		—		—		—		315,787
Nonresidential real estate	134,134		162		90		288		134,674
Commercial loans:
Regional commercial banking	24,853		—		—		—		24,853
Health care	62,084		8,346		—		—		70,430
Direct commercial lessor	50,431		—		—		—		50,431
Commercial leases:
Investment-rated commercial leases	133,332		507		—		—		133,839
Other commercial leases	137,893		761		136		—		138,790
Consumer	2,153		5		53		—		2,211
	$	1,163,028	$	9,847	$	1,053	$	800	$	1,174,728

- Definition

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

+ References + Details

Other Real Estate Owned (Notes)

3 Months Ended

Mar. 31, 2020

Other Real Estate [Abstract]

Real Estate Owned [Text Block]

Real estate that is acquired through foreclosure or a deed in lieu of foreclosure is classified as other real estate owned ("OREO") until it is sold. When real estate is acquired through foreclosure or by deed in lieu of foreclosure, it is recorded at its fair value, less the estimated costs of disposal. If the fair value of the property is less than the loan balance, the difference is charged against the allowance for loan losses.



	March 31, 2020						December 31, 2019
	Balance		Valuation Allowance		Net OREO Balance		Balance		Valuation Allowance		Net OREO Balance
One–to–four family residential	$	110	$	—	$	110	$	186	$	—	$	186

The following represents the roll forward of OREO and the composition of OREO properties:



	For the Three Months Ended March 31,
	2020			2019
Beginning balance	$	186		$	1,226
New foreclosed properties	—			46
Sales and other reductions	(76		)	(351		)
Ending balance	$	110		$	921

Activity in the valuation allowance is as follows:



	For the Three Months Ended March 31,
	2020		2019
Beginning balance	$	—	$	23
Reductions from sales of OREO	—		(23		)
Ending balance	$	—	$	—

At March 31, 2020 and December 31, 2019, the balance of OREO included no foreclosed residential real estate properties recorded as a result of obtaining physical possession of the property without title. At March 31, 2020 and December 31, 2019, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process was $237,000 for each period date.

- Definition

The entire disclosure for real estate owned (as defined). Generally, the largest component of real estate owned by lenders is assets taken in settlement of troubled loans through surrender or foreclosure. Real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned.

+ References + Details

LEASES (Notes)

3 Months Ended

Mar. 31, 2020

Leases [Abstract]

LEASES



	Statement of Financial Condition Location	March 31, 2020			December 31, 2019
Operating Lease Right of Use Asset:
Gross carrying amount		$	6,694		$	—
New lease obligation		111			6,694
Accumulated amortization		(1,067		)	(848		)
Net carrying value	Other assets	$	5,738		$	5,846

Operating Lease Liabilities:
Right of use lease obligations	Other liabilities	$	5,738		$	5,846

Amortization expense was $219,000 and $212,000 for the three months ended March 31, 2020 and 2019, respectively. At March 31, 2020, the weighted-average remaining lease term for the operating leases was 8.7 years and the weighted-average discount rate used in the measurement of operating lease liabilities was 3.13%. The Company utilized the FHLB fixed rate advance rate for the term most closely aligning with the remaining lease term.



	For the Three Months Ended March 31,
	2020			2019
Lease cost:
Operating lease cost	$	219		$	212
Short-term lease cost	30			31
Sublease income	(18		)	(6		)
Total lease cost	$	231		$	237

Other information:
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	234		$	223

Future minimum payments under non-cancellable operating leases with terms longer than 12 months, are as follows at March 31, 2020:



Twelve months ended March 31,
2021	$	947
2022	967
2023	1,011
2024	828
2025	502
Thereafter	2,597
Total future minimum operating lease payments	6,852
Amounts representing interest	(1,114		)
Present value of net future minimum operating lease payments	$	5,738

Securities Sold Under Agreements to Repurchase (Notes)

3 Months Ended

Mar. 31, 2020

Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]

Securities Sold Under Agreements to Repurchase

Securities sold under agreements to repurchase, included with borrowings on the consolidated balance sheet, are shown below.



	Overnight and Continuous		Up to 30 days		30 - 90 days		Greater Than 90 days		Total
December 31, 2019
Repurchase agreements and repurchase-to-maturity transactions	$	61	$	—	$	—	$	—	$	61
Gross amount of recognized liabilities for repurchase agreements in Consolidated Statements of Financial Condition									$	61

There were no repurchase agreements and repurchase-to-maturity transactions at March 31, 2020.

Securities sold under agreements to repurchase were secured by a mortgage-backed security with a carrying amount of $2.0 million at December 31, 2019. As the security's value fluctuates due to market conditions, the Company has no control over the market value. The Company is obligated to promptly transfer additional securities if the market value of the securities falls below the repurchase price, per the agreement.

There were no outstanding FHLB borrowings at March 31, 2020 and December 31, 2019.

On April 1, 2020, the Company entered into a $5.0 million unsecured line of credit with a correspondent bank at the parent company level. Interest is payable at a rate of Prime rate minus 0.75%. The line of credit will mature on April 1, 2021.

Fair Value (Notes)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value

ue is the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. There are three levels of inputs that may be used to measure fair values:


•	Level 1 – Quoted prices (unadjusted) for identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date.


•	Level 2 – Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.


•	Level 3 – Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability.

The Company used the following methods and significant assumptions to estimate the fair value of each type of financial instrument:

Securities: The fair values of debt securities are generally determined by matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities, but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2).

Other investments: Other investments includes our investments in equity securities without readily determinable fair values. Equity investments without readily determinable fair values, includes our Visa Class B shares, which are categorized as Level 3. Our Visa Class B ownership includes shares acquired at no cost from our prior participation in Visa’s network while Visa operated as a cooperative.

Impaired loans: The fair value of impaired loans with specific allocations of the allowance for loan losses is generally based on recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available for similar loans and collateral underlying such loans. Non-real estate collateral may be valued using an appraisal, net book value per the borrower’s financial statements, or aging reports, adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation, and management’s expertise and knowledge of the client and client’s business, resulting in a Level 3 fair value classification. Impaired loans are evaluated on a quarterly basis for additional impairment and adjusted in accordance with the allowance policy.

Other real estate owned: Assets acquired through or instead of loan foreclosure are initially recorded at fair value less costs to sell when acquired, establishing a new cost basis. These assets are subsequently accounted for at lower of cost or fair value less estimated costs to sell. Fair value is commonly based on recent real estate appraisals which are updated no less frequently than annually. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach with data from comparable properties. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. Real estate owned properties are evaluated on a quarterly basis for additional impairment and adjusted accordingly.

The following table sets forth the Company’s financial assets that were accounted for at fair value and are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.



	Fair Value Measurements Using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
March 31, 2020
Securities:
Certificates of deposit	$	—	$	53,234	$	—	$	53,234
Municipal securities	—		511		—		511
Mortgage-backed securities – residential	—		7,299		—		7,299
Collateralized mortgage obligations – residential	—		2,809		—		2,809
	$	—	$	63,853	$	—	$	63,853
December 31, 2019
Securities:
Certificates of deposit	$	—	$	48,666	$	—	$	48,666
Municipal securities	—		513		—		513
Mortgage-backed securities - residential	—		8,037		—		8,037
Collateralized mortgage obligations – residential	—		2,977		—		2,977
	$	—	$	60,193	$	—	$	60,193

At March 31, 2020 and December 31, 2019 there were no impaired loans that were measured for impairment using the fair value of the collateral for collateral–dependent loans and which had specific valuation allowances.

At March 31, 2020 and December 31, 2019 there were no OREO properties with valuation allowances.

The carrying amount and estimated fair value of financial instruments are as follows:



			Fair Value Measurements at March 31, 2020 Using:
	Carrying Amount		Level 1		Level 2		Level 3		Total
Financial assets
Cash and cash equivalents	$	169,938	$	14,652	$	155,286	$	—	$	169,938
Securities	63,853		—		63,853		—		63,853
Loans receivable, net of allowance for loan losses	1,147,628		—		—		1,143,263		1,143,263
FHLB and FRB stock	7,490		—		—		—		N/A
Accrued interest receivable	4,698		—		192		4,506		4,698
Financial liabilities
Certificates of deposit	373,049		—		376,171		—		376,171
Borrowings	—		—		—		—		—



			Fair Value Measurements at December 31, 2019 Using:
	Carrying Amount		Level 1		Level 2		Level 3		Total
Financial assets
Cash and cash equivalents	$	190,325	$	9,785	$	180,540	$	—	$	190,325
Securities	60,193		—		60,193		—		60,193
Loans receivable, net of allowance for loan losses	1,168,008		—		—		1,177,459		1,177,459
FHLB and FRB stock	7,490		—		—		—		N/A
Accrued interest receivable	4,563		—		252		4,311		4,563
Financial liabilities
Certificates of deposit	402,034		—		402,914		—		402,914
Borrowings	61		—		61		—		61

Loans: The exit price observations are obtained from an independent third-party using its proprietary valuation model and methodology and may not reflect actual or prospective market valuations. The valuation is based on the probability of default, loss given default, recovery delay, prepayment, and discount rate assumptions.

While the above estimates are based on management’s judgment of the most appropriate factors, as of the balance sheet date, there is no assurance that the estimated fair values would have been realized if the assets were disposed of or the liabilities settled at that date, since market values may differ depending on the various circumstances. The estimated fair values would also not apply to subsequent dates.

In addition, other assets and liabilities that are not financial instruments, such as premises and equipment, are not included in the above disclosures.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Revenue From Contracts With Customers

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Revenue From Contracts With Customers

All of the Company's revenue from contracts with customers within the scope of ASC 606 is recognized within noninterest income. The following table presents the Company's sources of noninterest income. Items outside of the scope of the ASC 606 are noted as such.



	Three Months Ended March 31,
	2020			2019
Deposit service charges and fees	$	887		$	930
Loan servicing fees ⁽¹⁾	63			23
Mortgage brokerage and banking fees ⁽¹⁾	29			28
Gain on sale of equity securities ⁽¹⁾	—			295
Loss on disposal of other assets	(2		)	(19		)
Trust and insurance commissions and annuities income	282			205
Earnings on bank-owned life insurance ⁽¹⁾	32			30
Other ⁽¹⁾	107			132
Total noninterest income	$	1,398		$	1,624

(1) Not within the scope of ASC 606

A description of the Company's revenue streams accounted for under ASC 606 follows:

Deposit service charges and fees: The Company earns fees from its deposit customers based on specific types of transactions, account maintenance and overdraft services. Transaction-based fees, which include services such as ATM use fees, stop payment charges, statement rendering, and ACH fees, are recognized at the time the transaction is executed as that is the point in time the Company fulfills the customer's request. Account maintenance fees, which relate primarily to monthly maintenance, are earned over the course of a month, representing the period over which the Company satisfies the performance obligation. Overdraft fees are recognized at the point in time that the overdraft occurs. Service charges on deposits are withdrawn from the customer's account balance.

Interchange income: The Company earns interchange fees from debit cardholder transactions conducted through the Visa payment network. Interchange fees from cardholder transactions represent a percentage of the underlying transaction value and are recognized daily, concurrently with the transaction processing services provided to the cardholder. Interchange income is included in deposit service charges and fees. Interchange income was $351,000 and $361,000 for the three months ended March 31, 2020 and 2019.

Trust and insurance commissions and annuities income: The Company earns trust, insurance commissions and annuities income from its contracts with trust customers to manage assets for investment, and/or to transact on their accounts. These fees are primarily earned over time as the Company provides the contracted monthly or quarterly services and are generally assessed based on a tiered scale of the market value of assets under management (AUM) at month-end. Fees that are transaction based, including trade execution services, are recognized at the point in time that the transaction is executed, i.e., the trade date. Other related services provided include fees the Company earns, which are based on a fixed fee schedule, are recognized when the services are rendered.

Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	Basis of Presentation: BankFinancial Corporation, a Maryland corporation headquartered in Burr Ridge, Illinois, is the owner of all of the issued and outstanding capital stock of BankFinancial, National Association (the “Bank”). The interim unaudited consolidated financial statements include the accounts and transactions of BankFinancial Corporation, the Bank, and the Bank’s wholly-owned subsidiaries, Financial Assurance Services, Inc. and BFIN Asset Recovery Company, LLC (collectively, “the Company”), and reflect all normal and recurring adjustments that are, in the opinion of management, considered necessary for a fair presentation of the financial condition and results of operations for the periods presented. Such adjustments are the only adjustments reflected in the accompanying financial statements. All significant intercompany accounts and transactions have been eliminated. The results of operations for the three month period ended March 31, 2020 is not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2020 or for any other period. Certain information and note disclosures normally included in financial statements prepared in conformity with accounting principles generally accepted in the United States of America (“US GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission. Use of Estimates: The preparation of the consolidation financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Although these estimates and assumptions are based on the best available information, actual information, actual results could differ from those estimates. COVID-19: The Company has evaluated subsequent events for potential recognition and/or disclosure through the date the unaudited consolidated financial statements included in this Quarterly Report on Form 10-Q were issued. On March 11, 2020, the World Health Organization declared the outbreak of a novel coronavirus (“COVID-19”) as a global pandemic, which continues to spread throughout the United States and around the world. The declaration of a global pandemic indicates that almost all public commerce and related business activities must be, to varying degrees, curtailed with the goal of decreasing the rate of new infections. The outbreak of COVID-19 could adversely impact a broad range of industries in which the Company’s customers operate and impair their ability to fulfill their financial obligations to the Company. On March 3, 2020, the Federal Open Market Committee reduced the target federal funds rate by 50 basis points to 1.00% to 1.25%. This rate was further reduced to a target range of 0% to 0.25% on March 16, 2020. These reductions in interest rates and other effects of the COVID-19 outbreak may adversely affect the Company’s financial condition and results of operations. As a result of the spread of the COVID-19 coronavirus, economic uncertainties have arisen which are likely to negatively impact net interest income and noninterest income. Other financial impact could occur though such potential impact is unknown at this time. Reclassifications: Certain reclassifications have been made in the prior period’s financial statements to conform them to the current period’s presentation. These unaudited consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, as filed with the Securities and Exchange Commission. Newly Issued Not Yet Effective Accounting Standards In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). These amendments require the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. Many of the loss estimation techniques applied today will still be permitted, although the inputs to those techniques will change to reflect the full amount of expected credit losses. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. For SEC filers who are smaller reporting companies, ASU 2016-13 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022.
Basis of Presentation	Basis of Presentation: BankFinancial Corporation, a Maryland corporation headquartered in Burr Ridge, Illinois, is the owner of all of the issued and outstanding capital stock of BankFinancial, National Association (the “Bank”).
Principles of Consolidation	The interim unaudited consolidated financial statements include the accounts and transactions of BankFinancial Corporation, the Bank, and the Bank’s wholly-owned subsidiaries, Financial Assurance Services, Inc. and BFIN Asset Recovery Company, LLC (collectively, “the Company”), and reflect all normal and recurring adjustments that are, in the opinion of management, considered necessary for a fair presentation of the financial condition and results of operations for the periods presented. Such adjustments are the only adjustments reflected in the accompanying financial statements. All significant intercompany accounts and transactions have been eliminated. The results of operations for the three month period ended March 31, 2020 is not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2020 or for any other period. Certain information and note disclosures normally included in financial statements prepared in conformity with accounting principles generally accepted in the United States of America (“US GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission.
Use of Estimates	Use of Estimates: The preparation of the consolidation financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Although these estimates and assumptions are based on the best available information, actual information, actual results could differ from those estimates.
Uncollected Interest Policy	The Company’s reserve for uncollected loan interest was $94,000 and $81,000 at March 31, 2020 and December 31, 2019, respectively. When a loan is on nonaccrual status and the ultimate collectability of the total principal of an impaired loan is in doubt, all payments are applied to principal under the cost recovery method. Alternatively, when a loan is on nonaccrual status but there is doubt concerning only the ultimate collectability of interest, contractual interest is credited to interest income only when received, under the cash basis method pursuant to the provisions of FASB ASC 310–10, as applicable. In all cases, the average balances are calculated based on the month–end balances of the financing receivables within the period reported pursuant to the provisions of FASB ASC 310–10, as applicable.
Reclassifications	Reclassifications: Certain reclassifications have been made in the prior period’s financial statements to conform them to the current period’s presentation. These unaudited consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, as filed with the Securities and Exchange Commission.
Recent Accounting Pronouncements	Newly Issued Not Yet Effective Accounting Standards In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). These amendments require the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. Many of the loss estimation techniques applied today will still be permitted, although the inputs to those techniques will change to reflect the full amount of expected credit losses. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. For SEC filers who are smaller reporting companies, ASU 2016-13 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022.

Summary of Significant Accounting Policies New Accounting Pronouncements (Policies)	3 Months Ended
	Mar. 31, 2020
Text Block [Abstract]
Recent Accounting Pronouncements	Newly Issued Not Yet Effective Accounting Standards In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). These amendments require the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. Many of the loss estimation techniques applied today will still be permitted, although the inputs to those techniques will change to reflect the full amount of expected credit losses. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. For SEC filers who are smaller reporting companies, ASU 2016-13 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022.

Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]



	Three Months Ended March 31,
	2020		2019
Net income available to common stockholders	$	2,418	$	3,551
Basic and diluted weighted average common shares outstanding	15,205,731		16,202,303
Basic and diluted earnings per common share	$	0.16	$	0.22

Securities (Tables)

3 Months Ended

Mar. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

The fair value of securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income is as follows:



	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-Sale Securities
March 31, 2020
Certificates of deposit	$	53,234	$	—	$	—		$	53,234
Municipal securities	505		6		—			511
Mortgage-backed securities - residential	7,062		237		—			7,299
Collateralized mortgage obligations - residential	2,840		3		(34		)	2,809
	$	63,641	$	246	$	(34	)	$	63,853
December 31, 2019
Certificates of deposit	$	48,666	$	—	$	—		$	48,666
Municipal securities	505		8		—			513
Mortgage-backed securities - residential	7,727		310		—			8,037
Collateralized mortgage obligations - residential	2,986		4		(13		)	2,977
	$	59,884	$	322	$	(13	)	$	60,193



	March 31, 2020
	Amortized Cost		Fair Value
Due in one year or less	$	53,335	$	53,335
Due after one year through five years	404		410
	53,739		53,745
Mortgage-backed securities - residential	7,062		7,299
Collateralized mortgage obligations - residential	2,840		2,809
	$	63,641	$	63,853

Sales of equity securities were as follows:



	Three Months Ended March 31,
	2020		2019
Proceeds	$	—	$	3,722
Gross gains	—		295
Gross losses	—		—

Securities with unrealized losses not recognized in income are as follows:



	Less than 12 Months							12 Months or More							Total
	Count		Fair Value		Unrealized Loss			Count		Fair Value		Unrealized Loss			Count	Fair Value		Unrealized Loss
March 31, 2020
Collateralized mortgage obligations - residential	$	2	$	623	$	(2	)	$	3	$	1,941	$	(32	)	5	$	2,564	$	(34	)

December 31, 2019
Collateralized mortgage obligations - residential	3		$	1,566	$	(10	)	1		$	937	$	(3	)	4	$	2,503	$	(13	)

Unrealized gains and losses recognized in accumulated other comprehensive income (loss)

The fair value of securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income is as follows:



	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-Sale Securities
March 31, 2020
Certificates of deposit	$	53,234	$	—	$	—		$	53,234
Municipal securities	505		6		—			511
Mortgage-backed securities - residential	7,062		237		—			7,299
Collateralized mortgage obligations - residential	2,840		3		(34		)	2,809
	$	63,641	$	246	$	(34	)	$	63,853
December 31, 2019
Certificates of deposit	$	48,666	$	—	$	—		$	48,666
Municipal securities	505		8		—			513
Mortgage-backed securities - residential	7,727		310		—			8,037
Collateralized mortgage obligations - residential	2,986		4		(13		)	2,977
	$	59,884	$	322	$	(13	)	$	60,193

Amortized cost and fair values of securities



	March 31, 2020
	Amortized Cost		Fair Value
Due in one year or less	$	53,335	$	53,335
Due after one year through five years	404		410
	53,739		53,745
Mortgage-backed securities - residential	7,062		7,299
Collateralized mortgage obligations - residential	2,840		2,809
	$	63,641	$	63,853

Securities with unrealized losses

Securities with unrealized losses not recognized in income are as follows:



	Less than 12 Months							12 Months or More							Total
	Count		Fair Value		Unrealized Loss			Count		Fair Value		Unrealized Loss			Count	Fair Value		Unrealized Loss
March 31, 2020
Collateralized mortgage obligations - residential	$	2	$	623	$	(2	)	$	3	$	1,941	$	(32	)	5	$	2,564	$	(34	)

December 31, 2019
Collateralized mortgage obligations - residential	3		$	1,566	$	(10	)	1		$	937	$	(3	)	4	$	2,503	$	(13	)

Loans Receivable (Tables)

3 Months Ended

Mar. 31, 2020

Receivables [Abstract]

Loans receivable

Loans receivable are as follows:



	March 31, 2020			December 31, 2019
One-to-four family residential real estate	$	52,849		$	55,750
Multi-family mortgage	542,421			563,750
Nonresidential real estate	133,432			134,674
Commercial loans	158,049			145,714
Commercial leases	266,063			272,629
Consumer	2,078			2,211
	1,154,892			1,174,728
Net deferred loan origination costs	848			912
Allowance for loan losses	(8,112		)	(7,632		)
Loans, net	$	1,147,628		$	1,168,008

Loans Receivable Based On Impairment Method

The following tables present the balance in the allowance for loan losses and loans receivable by portfolio segment and based on impairment method:



	Allowance for loan losses						Loan Balances
	Individually evaluated for impairment		Collectively evaluated for impairment		Total		Individually evaluated for impairment		Collectively evaluated for impairment		Total
March 31, 2020
One-to-four family residential real estate	$	—	$	682	$	682	$	1,826	$	51,023	$	52,849
Multi-family mortgage	—		3,869		3,869		612		541,809		542,421
Nonresidential real estate	—		1,460		1,460		288		133,144		133,432
Commercial loans	—		1,275		1,275		—		158,049		158,049
Commercial leases	—		780		780		88		265,975		266,063
Consumer	—		46		46		—		2,078		2,078
	$	—	$	8,112	$	8,112	$	2,814	$	1,152,078	1,154,892
Net deferred loan origination costs											848
Allowance for loan losses											(8,112		)
Loans, net											$	1,147,628

The following tables present loans individually evaluated for impairment by class of loans:



									Three months ended March 31, 2020
	Loan Balance		Recorded Investment		Partial Charge-off		Allowance for Loan Losses Allocated		Average Investment in Impaired Loans		Interest Income Recognized
March 31, 2020
With no related allowance recorded:
One-to-four family residential real estate	$	2,162	$	1,826	$	346	$	—	$	1,845	$	12
Multi-family mortgage - Illinois	612		612		—		—		616		9
Nonresidential real estate	280		288		—		—		288		—
Other commercial leases	96		88		—		—		50		2
	$	3,150	$	2,814	$	346	$	—	$	2,799	$	23



									Year ended December 31, 2019
	Loan Balance		Recorded Investment		Partial Charge-off		Allowance for Loan Losses Allocated		Average Investment in Impaired Loans		Interest Income Recognized
December 31, 2019
With no related allowance recorded:
One-to-four family residential real estate	$	2,168	$	1,835	$	339	$	—	$	2,208	$	51
Multi-family mortgage - Illinois	620		620		—		—		637		37
Nonresidential real estate	280		288		—		—		589		2
	$	3,068	$	2,743	$	339	$	—	$	3,434	$	90

Allowance for loan losses

wance for loan losses by portfolio segment:



	One-to-four family residential real estate			Multi-family mortgage		Non-residential real estate			Construc-tion and land			Commer-cial loans			Commer-cial leases			Consumer			Total
March 31, 2020
Allowance for loan losses:
Beginning balance	$	675		$	3,676	$	1,176		$	—		$	1,308		$	757		$	40		$	7,632
Provision for (recovery of) loan losses	(1		)	181		284			—			(35		)	23			19			471
Loans charged off	(5		)	—		—			—			—			—			(13		)	(18		)
Recoveries	13			12		—			—			2			—			—			27
Total ending allowance balance	$	682		$	3,869	$	1,460		$	—		$	1,275		$	780		$	46		$	8,112

March 31, 2019
Allowance for loan losses:
Beginning balance	699			3,991		1,476			4			1,517			755			28			$	8,470
Provision for (recovery of) loan losses	(44		)	80		39			(1		)	(97		)	(65		)	1			(87		)
Loans charged off	(23		)	—		(28		)	—			—			—			(5		)	(56		)
Recoveries	17			8		—			—			2			—			—			27
Total ending allowance balance	$	649		$	4,079	$	1,487		$	3		$	1,422		$	690		$	24		$	8,354

Schedule of Financing Receivables, Non Accrual Status

The following tables present the recorded investment in nonaccrual and loans 90 days or more past due still on accrual by class of loans:



	Loan Balance		Recorded Investment		Loans Past Due Over 90 Days, Still Accruing
March 31, 2020
One-to-four family residential real estate	$	500	$	476	$	—
Nonresidential real estate	280		288		—
	$	780	$	764	$	—
December 31, 2019
One-to-four family residential real estate	$	598	$	512	$	—
Nonresidential real estate	280		288		—
Investment-rated commercial leases	47		—		47
	$	925	$	800	$	47

Past Due Financing Receivables

The following tables present the aging of the recorded investment of loans by class of loans:



	30-59 Days Past Due		60-89 Days Past Due		90 Days or Greater Past Due		Total Past Due		Loans Not Past Due		Total
March 31, 2020
One-to-four family residential real estate loans:
Owner occupied	$	657	$	—	$	472	$	1,129	$	41,651	$	42,780
Non-owner occupied	131		—		—		131		9,938		10,069
Multi-family mortgage:
Illinois	1,258		—		—		1,258		233,404		234,662
Other	—		—		—		—		307,759		307,759
Nonresidential real estate	—		—		288		288		133,144		133,432
Commercial loans:
Regional commercial banking	—		—		—		—		23,704		23,704
Health care	—		—		—		—		54,806		54,806
Direct commercial lessor	—		—		—		—		79,539		79,539
Commercial leases:
Investment-rated commercial leases	5,109		—		—		5,109		119,342		124,451
Other commercial leases	4,093		443		—		4,536		137,076		141,612
Consumer	7		7		—		14		2,064		2,078
	$	11,255	$	450	$	760	$	12,465	$	1,142,427	$	1,154,892



	30-59 Days Past Due		60-89 Days Past Due		90 Days or Greater Past Due		Total Past Due		Loans Not Past Due		Total
December 31, 2019
One-to-four family residential real estate loans:
Owner occupied	$	777	$	340	$	507	$	1,624	$	43,365	$	44,989
Non-owner occupied	280		15		—		295		10,466		10,761
Multi-family mortgage:
Illinois	981		302		—		1,283		246,680		247,963
Other	—		—		—		—		315,787		315,787
Nonresidential real estate	—		—		288		288		134,386		134,674
Commercial loans:
Regional commercial banking	—		—		—		—		24,853		24,853
Health care	—		—		—		—		70,430		70,430
Direct commercial lessor	—		—		—		—		50,431		50,431
Commercial leases:
Investment-rated commercial leases	826		—		47		873		132,966		133,839
Other commercial leases	543		136		—		679		138,111		138,790
Consumer	24		37		—		61		2,150		2,211
	$	3,431	$	830	$	842	$	5,103	$	1,169,625	$	1,174,728

Financing Receivable Credit Quality Indicators



	Pass		Special Mention		Substandard		Nonaccrual		Total
March 31, 2020
One-to-four family residential real estate loans:
Owner occupied	$	41,815	$	83	$	406	$	476	$	42,780
Non-owner occupied	10,006		29		34		—		10,069
Multi-family mortgage:
Illinois	234,662		—		—		—		234,662
Other	307,759		—		—		—		307,759
Nonresidential real estate	132,894		161		89		288		133,432
Commercial loans:
Regional commercial banking	23,704		—		—		—		23,704
Health care	53,863		943		—		—		54,806
Direct commercial lessor	79,539		—		—		—		79,539
Commercial leases:
Investment-rated commercial leases	124,451		—		—		—		124,451
Other commercial leases	139,882		307		1,423		—		141,612
Consumer	2,059		10		9		—		2,078
	$	1,150,634	$	1,533	$	1,961	$	764	$	1,154,892



	Pass		Special Mention		Substandard		Nonaccrual		Total
December 31, 2019
One-to-four family residential real estate loans
Owner occupied	$	43,908	$	36	$	533	$	512	$	44,989
Non-owner occupied	10,696		30		35		—		10,761
Multi-family mortgage:
Illinois	247,757		—		206		—		247,963
Other	315,787		—		—		—		315,787
Nonresidential real estate	134,134		162		90		288		134,674
Commercial loans:
Regional commercial banking	24,853		—		—		—		24,853
Health care	62,084		8,346		—		—		70,430
Direct commercial lessor	50,431		—		—		—		50,431
Commercial leases:
Investment-rated commercial leases	133,332		507		—		—		133,839
Other commercial leases	137,893		761		136		—		138,790
Consumer	2,153		5		53		—		2,211
	$	1,163,028	$	9,847	$	1,053	$	800	$	1,174,728

Other Real Estate Owned (Tables)

3 Months Ended

Mar. 31, 2020

Other Real Estate [Abstract]

Schedule of Real Estate Properties [Table Text Block]



	March 31, 2020						December 31, 2019
	Balance		Valuation Allowance		Net OREO Balance		Balance		Valuation Allowance		Net OREO Balance
One–to–four family residential	$	110	$	—	$	110	$	186	$	—	$	186

Real Estate Owned, rollforward [Table Text Block]

The following represents the roll forward of OREO and the composition of OREO properties:



	For the Three Months Ended March 31,
	2020			2019
Beginning balance	$	186		$	1,226
New foreclosed properties	—			46
Sales and other reductions	(76		)	(351		)
Ending balance	$	110		$	921

OREO valuation allowance, rollforward [Table Text Block]

Activity in the valuation allowance is as follows:



	For the Three Months Ended March 31,
	2020		2019
Beginning balance	$	—	$	23
Reductions from sales of OREO	—		(23		)
Ending balance	$	—	$	—

LEASES (Tables)

3 Months Ended

Mar. 31, 2020

Leases [Abstract]

Leases

The following table represents the classification of the Company's right of use and lease liabilities:



	Statement of Financial Condition Location	March 31, 2020			December 31, 2019
Operating Lease Right of Use Asset:
Gross carrying amount		$	6,694		$	—
New lease obligation		111			6,694
Accumulated amortization		(1,067		)	(848		)
Net carrying value	Other assets	$	5,738		$	5,846

Operating Lease Liabilities:
Right of use lease obligations	Other liabilities	$	5,738		$	5,846



	For the Three Months Ended March 31,
	2020			2019
Lease cost:
Operating lease cost	$	219		$	212
Short-term lease cost	30			31
Sublease income	(18		)	(6		)
Total lease cost	$	231		$	237

Other information:
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	234		$	223

Operating Lease, Liability

Future minimum payments under non-cancellable operating leases with terms longer than 12 months, are as follows at March 31, 2020:



Twelve months ended March 31,
2021	$	947
2022	967
2023	1,011
2024	828
2025	502
Thereafter	2,597
Total future minimum operating lease payments	6,852
Amounts representing interest	(1,114		)
Present value of net future minimum operating lease payments	$	5,738

Securities Sold Under Agreements to Repurchase (Tables)

3 Months Ended

Mar. 31, 2020

Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Abstract]

Securities sold under agreements to repurchase

Securities sold under agreements to repurchase, included with borrowings on the consolidated balance sheet, are shown below.



	Overnight and Continuous		Up to 30 days		30 - 90 days		Greater Than 90 days		Total
December 31, 2019
Repurchase agreements and repurchase-to-maturity transactions	$	61	$	—	$	—	$	—	$	61
Gross amount of recognized liabilities for repurchase agreements in Consolidated Statements of Financial Condition									$	61

Fair Value (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of Company's financial instruments measured at fair values



	Fair Value Measurements Using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
March 31, 2020
Securities:
Certificates of deposit	$	—	$	53,234	$	—	$	53,234
Municipal securities	—		511		—		511
Mortgage-backed securities – residential	—		7,299		—		7,299
Collateralized mortgage obligations – residential	—		2,809		—		2,809
	$	—	$	63,853	$	—	$	63,853
December 31, 2019
Securities:
Certificates of deposit	$	—	$	48,666	$	—	$	48,666
Municipal securities	—		513		—		513
Mortgage-backed securities - residential	—		8,037		—		8,037
Collateralized mortgage obligations – residential	—		2,977		—		2,977
	$	—	$	60,193	$	—	$	60,193

Carrying amount and estimated fair value of financial instruments

The carrying amount and estimated fair value of financial instruments are as follows:



			Fair Value Measurements at March 31, 2020 Using:
	Carrying Amount		Level 1		Level 2		Level 3		Total
Financial assets
Cash and cash equivalents	$	169,938	$	14,652	$	155,286	$	—	$	169,938
Securities	63,853		—		63,853		—		63,853
Loans receivable, net of allowance for loan losses	1,147,628		—		—		1,143,263		1,143,263
FHLB and FRB stock	7,490		—		—		—		N/A
Accrued interest receivable	4,698		—		192		4,506		4,698
Financial liabilities
Certificates of deposit	373,049		—		376,171		—		376,171
Borrowings	—		—		—		—		—



			Fair Value Measurements at December 31, 2019 Using:
	Carrying Amount		Level 1		Level 2		Level 3		Total
Financial assets
Cash and cash equivalents	$	190,325	$	9,785	$	180,540	$	—	$	190,325
Securities	60,193		—		60,193		—		60,193
Loans receivable, net of allowance for loan losses	1,168,008		—		—		1,177,459		1,177,459
FHLB and FRB stock	7,490		—		—		—		N/A
Accrued interest receivable	4,563		—		252		4,311		4,563
Financial liabilities
Certificates of deposit	402,034		—		402,914		—		402,914
Borrowings	61		—		61		—		61

Revenue From Contracts With Customers (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Noninterest Income Outside the Scope of ASC 606

The following table presents the Company's sources of noninterest income. Items outside of the scope of the ASC 606 are noted as such.



	Three Months Ended March 31,
	2020			2019
Deposit service charges and fees	$	887		$	930
Loan servicing fees ⁽¹⁾	63			23
Mortgage brokerage and banking fees ⁽¹⁾	29			28
Gain on sale of equity securities ⁽¹⁾	—			295
Loss on disposal of other assets	(2		)	(19		)
Trust and insurance commissions and annuities income	282			205
Earnings on bank-owned life insurance ⁽¹⁾	32			30
Other ⁽¹⁾	107			132
Total noninterest income	$	1,398		$	1,624

(1) Not within the scope of ASC 606

Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Gross carrying amount	$ 5,738,000	$ 5,846,000
Right of use lease obligations	5,738,000	5,846,000	$ 6,700,000
Intangible Assets, Net (Excluding Goodwill)	$ 27,000	$ 41,000

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income available to common stockholders	$ 2,418	$ 3,551
Average common shares outstanding (shares)	15,205,731	16,202,303
Basic earnings per common share (usd per share)	$ 0.16	$ 0.22
Retained Earnings [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income available to common stockholders	$ 2,418	$ 3,551

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(19))
-URI http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109260490&loc=d3e1337-109256

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 55
-Paragraph 52
-URI http://asc.fasb.org/extlink&oid=109256448&loc=d3e4984-109258

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(21))
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109260490&loc=d3e1252-109256

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(23))
-URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 60B
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109260490&loc=SL5780133-109256

+ Details

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

+ Details

Securities - Fair Value of Securites (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Unrealized gains and losses recognized in accumulated other comprehensive income (loss)
Amortized Cost	$ 63,641	$ 59,884
Gross Unrealized Gains	246	322
Gross Unrealized Losses	(34)	(13)
Total Fair value	63,853	60,193
Certificates of deposit [Member]
Unrealized gains and losses recognized in accumulated other comprehensive income (loss)
Amortized Cost	53,234	48,666
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Total Fair value	53,234	48,666
Municipal Bonds [Member]
Unrealized gains and losses recognized in accumulated other comprehensive income (loss)
Available-for-sale Securities, Amortized Cost Basis	505	505
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	6	8
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0	0
Total Fair value	511	513
Equity mutual fund [Member]
Unrealized gains and losses recognized in accumulated other comprehensive income (loss)
Total Fair value	0
Mortgage - backed securities - residential [Member]
Unrealized gains and losses recognized in accumulated other comprehensive income (loss)
Amortized Cost	7,062	7,727
Gross Unrealized Gains	237	310
Gross Unrealized Losses	0	0
Total Fair value	7,299	8,037
Collateralized mortgage obligations - residential [Member]
Unrealized gains and losses recognized in accumulated other comprehensive income (loss)
Amortized Cost	2,840	2,986
Gross Unrealized Gains	3	4
Gross Unrealized Losses	(34)	(13)
Total Fair value	$ 2,809	$ 2,977

Securities - Amortized Cost and Fair Value (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost	$ 53,335
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value	53,335
Amortized cost and fair values of securities
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	53,739
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	53,745
Available-for-sale Securities, Amortized Cost Basis	404
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value	410
Mortgage - backed securities - residential [Member]
Amortized cost and fair values of securities
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost	7,062
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	7,299
Collateralized mortgage obligations - residential [Member]
Amortized cost and fair values of securities
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost	2,840
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	$ 2,809

Securities - Proceeds and Gross Gains (Losses) From Sale of Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Proceeds and Gross Gains (Losses) from Sale of Securities [Abstract]
Proceeds	$ 0	$ 3,722
Gross gains	0	295
Gross losses	$ 0	$ 0

Securities - Unrealized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Amortized cost and fair values of securities
Less than 12 Months		$ 1,566
12 Months or More		937
Total		2,503
Unrealized loss of securities
Less than 12 Months, Unrealized Loss		(10)
12 Months or More		(3)
Unrealized Loss		$ (13)
Collateralized mortgage obligations - residential [Member]
Amortized cost and fair values of securities
Less than 12 Months	$ 623
12 Months or More	1,941
Total	2,564
Unrealized loss of securities
Less than 12 Months, Unrealized Loss	(2)
12 Months or More	(32)
Unrealized Loss	$ (34)

Securities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Securities - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2007	Mar. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Gain on sale of equity securities	$ 295
Collateral Pledged [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Restricted			$ 1,500	$ 2,000
Common Class B [Member]
Debt Securities, Available-for-sale [Line Items]
Sale of Stock, Number of Shares Issued in Transaction	(25,702)
Visa Inc's Initial Public Offering [Member] \| Common Class B [Member]
Debt Securities, Available-for-sale [Line Items]
Sale of Stock, Number of Shares Issued in Transaction		(51,404)
Shares, Outstanding				(25,702)

Loans Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Loans receivable
Total loans	$ 1,154,892	$ 1,174,728
Net deferred loan origination costs	848	912
Allowance for loan losses	(8,112)	(7,632)	$ (8,354)	$ (8,470)
Loans, net	1,147,628	1,168,008
One-to-four family residential real estate loans [Member]
Loans receivable
Total loans	52,849	55,750
Allowance for loan losses	(682)	(675)	(649)	(699)
Multi-family mortgage loans [Member]
Loans receivable
Total loans	542,421	563,750
Allowance for loan losses	(3,869)	(3,676)	(4,079)	(3,991)
Nonresidential real estate loans [Member]
Loans receivable
Total loans	133,432	134,674
Allowance for loan losses	(1,460)	(1,176)	(1,487)	(1,476)
Commercial loans [Member]
Loans receivable
Total loans	158,049	145,714
Allowance for loan losses	(1,275)	(1,308)
Commercial leases [Member]
Loans receivable
Total loans	266,063	272,629
Allowance for loan losses	(780)	(757)	$ (690)	$ (755)
Consumer loans [Member]
Loans receivable
Total loans	2,078	2,211
Allowance for loan losses	$ (46)	$ (40)

Loans Receivable - Loan Origination and Risk Management (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, amount	$ 1,154,892	$ 1,174,728
Multi-family mortgage loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, amount	542,421	563,750
Nonresidential Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, amount	133,432	134,674
Commercial leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases, amount	$ 266,063	$ 272,629

Loans Receivable - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	$ 8,112	$ 8,354	$ 7,632	$ 8,470
Provision for Loan and Lease Losses	471	(87)
Allowance for Loan and Lease Losses, Write-offs	(18)	(56)
Recoveries	27	27
Allowance for loan losses and the loans receivable by portfolio segment
Net deferred loan origination costs	848		912
Loans, net	1,147,628		1,168,008
One-to-four family residential real estate loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	682	649	675	699
Provision for Loan and Lease Losses	(1)	(44)
Allowance for Loan and Lease Losses, Write-offs	(5)	(23)
Recoveries	13	17
Multi-family mortgage loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	3,869	4,079	3,676	3,991
Provision for Loan and Lease Losses	181	80
Allowance for Loan and Lease Losses, Write-offs	0	0
Recoveries	12	8
Nonresidential real estate loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	1,460	1,487	1,176	1,476
Provision for Loan and Lease Losses	284	39
Allowance for Loan and Lease Losses, Write-offs	0	(28)
Commercial loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	1,275		1,308
Allowance for Loan and Lease Losses, Write-offs	0	0
Recoveries	2	2
Commercial leases [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	780	690	757	755
Provision for Loan and Lease Losses	23	(65)
Recoveries	0	0
Consumer loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	46		40
Allowance for Loan and Lease Losses, Write-offs	(13)	(5)
Recoveries	0	0
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for Loan and Lease Losses	19	1
Commercial Loans Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	1,275	1,422	1,308	1,517
Provision for Loan and Lease Losses	(35)	(97)
Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Allowance	$ 46	$ 24	$ 40	$ 28

Loans Receivable - Activity in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 7,632	$ 8,470
Loans charged off	(18)	(56)
Recoveries	27	27
Provision for (recovery of) loan losses	(471)	87
Ending balance	8,112	8,354
One-to-four family residential real estate loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	675	699
Loans charged off	(5)	(23)
Recoveries	13	17
Provision for (recovery of) loan losses	1	44
Ending balance	682	649
Multi-family mortgage loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,676	3,991
Loans charged off	0	0
Recoveries	12	8
Provision for (recovery of) loan losses	(181)	(80)
Ending balance	3,869	4,079
Nonresidential real estate loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,176	1,476
Loans charged off	0	(28)
Provision for (recovery of) loan losses	(284)	(39)
Ending balance	1,460	1,487
Construction and land loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0	4
Provision for (recovery of) loan losses	0	1
Ending balance	0	3
Commercial loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,308
Loans charged off	0	0
Recoveries	2	2
Ending balance	1,275
Commercial leases [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	757	755
Recoveries	0	0
Provision for (recovery of) loan losses	(23)	65
Ending balance	780	690
Consumer loans [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	40
Loans charged off	(13)	(5)
Recoveries	0	$ 0
Ending balance	$ 46

Loans Receivable - Loans Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 1,154,892			$ 1,174,728
Loans individually evaluated for impairment by class loans
Allowance for loan losses (With an allowance recorded)	0			0
Impaired Loan, Total	3,150			3,068
Recorded Investment, Total	2,814			2,743
Partial Charge-offs, Total	346			339
Average Investment in Impaired Loans, Total	2,799	$ 3,434
Interest Income Recognized, Total	23	90
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	8,112			7,632
Net deferred loan origination costs	848			912
Loans and Leases Receivable, Allowance	8,112	8,354		7,632	$ 8,470
Financing Receivable, Individually Evaluated for Impairment	2,814			2,743
Financing Receivable, Collectively Evaluated for Impairment	1,152,078			1,171,985
Loans, net	1,147,628			1,168,008
One-to-four family residential real estate loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	52,849			55,750
Loans individually evaluated for impairment by class loans
Loan Balance	2,162			2,168
Recorded Investment	1,826			1,835
Partial Charge-off	346			339
Average Investment in Impaired Loans	1,845	2,208
Interest Income Recognized	12	51
Allowance for loan losses (With an allowance recorded)	0			0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	682			675
Loans and Leases Receivable, Allowance	682	649		675	699
Financing Receivable, Individually Evaluated for Impairment	1,826			1,835
Financing Receivable, Collectively Evaluated for Impairment	51,023			53,915
One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	10,069			10,761
Multi-family mortgage loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	542,421			563,750
Loans individually evaluated for impairment by class loans
Loan Balance	612			620
Recorded Investment	612			620
Partial Charge-off	0			0
Average Investment in Impaired Loans	616	637
Interest Income Recognized	9	37
Allowance for loan losses (With an allowance recorded)	0			0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	3,869			3,676
Loans and Leases Receivable, Allowance	3,869	4,079		3,676	3,991
Financing Receivable, Individually Evaluated for Impairment	612			620
Financing Receivable, Collectively Evaluated for Impairment	541,809			563,130
Multi Family Mortgage Loans without wholesale [Member] [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	234,662			247,963
Wholesale commercial lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	307,759			315,787
Nonresidential real estate loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	133,432			134,674
Loans individually evaluated for impairment by class loans
Loan Balance	280			280
Recorded Investment	288			288
Partial Charge-off	0			0
Average Investment in Impaired Loans	288		$ 589
Interest Income Recognized	0		$ 2
Allowance for loan losses (With an allowance recorded)	0			0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,460			1,176
Loans and Leases Receivable, Allowance	1,460	1,487		1,176	1,476
Financing Receivable, Individually Evaluated for Impairment	288			288
Financing Receivable, Collectively Evaluated for Impairment	133,144			134,386
Commercial loans - Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	23,704			24,853
Commercial loans - other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	141,612			138,790
Loans individually evaluated for impairment by class loans
Loan Balance				96
Recorded Investment				88
Partial Charge-off				0
Average Investment in Impaired Loans	50
Interest Income Recognized	2
Loans and Leases Receivable, Allowance	1,275	1,422		1,308	1,517
Consumer loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	2,078			2,211
Loans individually evaluated for impairment by class loans
Allowance for loan losses (With an allowance recorded)	0			0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	46			40
Loans and Leases Receivable, Allowance	46			40
Financing Receivable, Individually Evaluated for Impairment	0			0
Financing Receivable, Collectively Evaluated for Impairment	2,078			2,211
Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	158,049			145,714
Loans individually evaluated for impairment by class loans
Allowance for loan losses (With an allowance recorded)	0			0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1,275			1,308
Loans and Leases Receivable, Allowance	1,275			1,308
Financing Receivable, Individually Evaluated for Impairment	0			0
Financing Receivable, Collectively Evaluated for Impairment	158,049			145,714
Finance Leases Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	266,063			272,629
Loans individually evaluated for impairment by class loans
Allowance for loan losses (With an allowance recorded)	0			0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	780			757
Loans and Leases Receivable, Allowance	780	$ 690		757	$ 755
Financing Receivable, Individually Evaluated for Impairment	88			0
Financing Receivable, Collectively Evaluated for Impairment	265,975			272,629
One to Four Family Residential Real Estate Loans-Owner occupied [Member] [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 42,780			$ 44,989

Loans Receivable - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Reserve For Uncollected Loan Interest	$ 94	$ 81
Unpaid Principal Balance	780	925
Recorded Investment	764	800
Loans Past Due Over 90 Days, still accruing	0	47
One-to-four family residential real estate loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	500	598
Recorded Investment	476	512
Loans Past Due Over 90 Days, still accruing	0	0
Wholesale Commercial Lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance		280
Loans Past Due Over 90 Days, still accruing		0
Nonresidential real estate loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unpaid Principal Balance	280
Recorded Investment	288	$ 288
Loans Past Due Over 90 Days, still accruing	$ 0

Loans Receivable - Troubled Debt Restructuring (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Financing Receivable, Modifications [Line Items]
Outstanding Commitments To Borrowers Loans Classified As Troubled Debt Restructurings	$ 0	$ 0
Troubled Debt Restructurings
Financing receivable modifications	$ 0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount			$ 0.0

Loans Receivable - Narrative (Details) - USD ($)	3 Months Ended
Loans Receivable - Narrative (Details) - USD ($)	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Receivables [Abstract]
Reserve For Uncollected Loan Interest	$ 94,000		$ 81,000
Financing receivable modifications	0
Outstanding Commitments To Borrowers Loans Classified As Troubled Debt Restructurings	$ 0	$ 0

Other Real Estate Owned (Details) - USD ($)	3 Months Ended
Other Real Estate Owned (Details) - USD ($)	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Repossessed Assets			$ 0
Mortgage Loans in Process of Foreclosure, Amount	$ 237,000		237,000
Real Estate Owned, Valuation Allowance, Amounts Applied	0	$ (23,000)
Real Estate Owned, Valuation Allowance	0	0	0	$ (23,000)
Other real estate owned, net	110,000	921,000	186,000	$ 1,226,000
Other Real Estate, Additions	0	46,000
Other Real Estate, Valuation Adjustments	0	0
Other Real Estate, Disposals	(76,000)	$ (351,000)
Other real estate owned at carrying value before valuation allowance	110,000		186,000
Residential Real Estate [Member]
Repossessed Assets	$ 0		$ 0

LEASES (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Beginning balance	$ 6,694	$ 0
New lease obligation	111	6,694	$ 6,694
Accumulated amortization	(1,067)	(848)
Net book value	5,738	5,846
Right of use lease obligations	$ 5,738	$ 5,846	$ 6,700

LEASES Narrative (Details)	Mar. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Weighted average remaining lease term - operating leases	8 years 8 months 16 days
Weighted average discount rate - operating leases		3.13%

LEASES Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended
LEASES Lease Costs (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of leases	$ 1,067	$ 212
Short-term lease cost	30	31
Sublease income	(18)	(6)
Total lease cost	231	237
Operating cash flows from operating leases	$ 234	$ 223

LEASES Lease Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Leases [Abstract]
2020	$ 947
2021	967
2022	1,011
2023	828
2024	502
Thereafter	2,597
Total future minimum operating lease payments	6,852
Amounts representing interest	(1,114)
Present value of net future minimum operating lease payments	$ 5,738	$ 5,846	$ 6,700

Securities Sold Under Agreements to Repurchase (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Federal Home Loan Bank, Advances [Line Items]
Carrying Value of Federal Funds Purchased, Securities Sold under Agreements to Repurchase, and Deposits Received for Securities Loaned	$ 0	$ 61,000
Federal Home Loan Bank Advances [Member] \| Period One [Member]
Federal Home Loan Bank, Advances [Line Items]
Debt, Long-term and Short-term, Combined Amount	0	0
Collateral Pledged [Member]
Federal Home Loan Bank, Advances [Line Items]
Debt Securities, Available-for-sale, Restricted	$ 1,500,000	$ 2,000,000

Fair Value - Carrying Amount and Estimated Fair Value of Finanical Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 169,938	$ 190,325
Financial assets
Securities, carrying amount	63,853	60,193
Loans receivable, net of allowance for loan losses, carrying amounts	1,147,628	1,168,008
FHLBC stock, carrying amount	7,490	7,490
Accrued interest receivable, carrying amount	4,698	4,563
Estimate of Fair Value, Fair Value Disclosure [Member]
Financial assets
Securities, carrying amount	63,853	60,193
Loans Receivable, Fair Value Disclosure	1,143,263	1,177,459
Accounts Receivable, Fair Value Disclosure	4,698	4,563
Financial liabilities
Cash and Cash Equivalents, Fair Value Disclosure	169,938	190,325
Certificates Of Deposit Fair Value Disclosure	376,171	402,914
Short Term Borrowings Fair Value Disclosure	0	61
Estimate of Fair Value, Fair Value Disclosure [Member] \| Level 1 [Member]
Financial assets
Loans Receivable, Fair Value Disclosure		0
Accounts Receivable, Fair Value Disclosure		0
Financial liabilities
Cash and Cash Equivalents, Fair Value Disclosure	14,652	9,785
Certificates Of Deposit Fair Value Disclosure		0
Short Term Borrowings Fair Value Disclosure		0
Estimate of Fair Value, Fair Value Disclosure [Member] \| Fair Value, Inputs, Level 2 [Member]
Financial assets
Securities, carrying amount	63,853	60,193
Loans Receivable, Fair Value Disclosure	0	0
Accounts Receivable, Fair Value Disclosure		252
Financial liabilities
Cash and Cash Equivalents, Fair Value Disclosure	155,286	180,540
Certificates of Deposit, at Carrying Value	376,171
Certificates Of Deposit Fair Value Disclosure		402,914
Short-term Debt		61
Estimate of Fair Value, Fair Value Disclosure [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial assets
Loans Receivable, Fair Value Disclosure	1,143,263	1,177,459
Accounts Receivable, Fair Value Disclosure	4,506	4,311
Reported Value Measurement [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Cash and Cash Equivalents, at Carrying Value	169,938	190,325
Financial assets
Securities, carrying amount	63,853	60,193
FHLBC stock, carrying amount	7,490	7,490
Accrued interest receivable, carrying amount		4,563
Financial liabilities
Certificates of Deposit, at Carrying Value	373,049	402,034
Short-term Debt	0	$ 61
Equity Funds [Member]
Financial assets
Securities, carrying amount	$ 0

Revenue From Contracts With Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue from External Customer [Line Items]
Income from product and service	$ 887	$ 930
Loan servicing fees	63	23
Mortgage brokerage and banking fees	29	28
Gain on sale of equity securities		295
Gross gains	0	295
Loss on disposal of other assets		(19)
Gain (Loss) on Disposition of Other Assets	(2)	(19)
Trust and insurance commissions and annuities income	282	205
Earnings on bank-owned life insurance	32	30
Other	107	132
Total noninterest income	1,398	1,624
Credit and Debit Card
Revenue from External Customer [Line Items]
Income from product and service	$ 351	$ 361

Loans Receivable - Past Due Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	$ 12,465	$ 5,103
Recorded Investment, Loans Not Past Due	1,142,427	1,169,625
Recorded investment, total	1,154,892	1,174,728
Commercial Leases Investment Rated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	5,109	873
Recorded Investment, Loans Not Past Due	119,342	132,966
Recorded investment, total	124,451	133,839
Commercial Loans Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	4,536	679
Recorded Investment, Loans Not Past Due	137,076	138,111
Recorded investment, total	141,612	138,790
Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	14	61
Recorded Investment, Loans Not Past Due	2,064	2,150
Recorded investment, total	2,078	2,211
Commercial Loans Health Care [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Loans Not Past Due	54,806	70,430
Recorded investment, total	54,806	70,430
Commercial Loans Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Recorded Investment, Loans Not Past Due	79,539	50,431
Recorded investment, total	79,539	50,431
Commercial loans - unsecured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Commercial loans - Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Recorded Investment, Loans Not Past Due	23,704	24,853
Recorded investment, total	23,704	24,853
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	288	288
Recorded Investment, Loans Not Past Due	133,144	134,386
Recorded investment, total	133,432	134,674
Wholesale Commercial Lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Recorded Investment, Loans Not Past Due	307,759	315,787
Recorded investment, total	307,759	315,787
Multi Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	1,258	1,283
Recorded Investment, Loans Not Past Due	233,404	246,680
Recorded investment, total	234,662	247,963
One To Four Family Residential Real Estate Loans Non Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	131	295
Recorded Investment, Loans Not Past Due	9,938	10,466
Recorded investment, total	10,069	10,761
One to Four Family Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	1,129	1,624
Recorded Investment, Loans Not Past Due	41,651	43,365
Recorded investment, total	42,780	44,989
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	11,255	3,431
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial Leases Investment Rated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	5,109	826
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial Loans Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	4,093	543
Financing Receivables, 30 to 59 Days Past Due [Member] \| Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	7	24
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial Loans Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial loans - unsecured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial loans - Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Wholesale Commercial Lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Multi Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	1,258	981
Financing Receivables, 30 to 59 Days Past Due [Member] \| One To Four Family Residential Real Estate Loans Non Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	131	280
Financing Receivables, 30 to 59 Days Past Due [Member] \| One to Four Family Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	657	777
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	450	830
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial Leases Investment Rated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due		0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial Loans Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	443	136
Financing Receivables, 60 to 89 Days Past Due [Member] \| Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	7	37
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial Loans Health Care [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial Loans Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial loans - unsecured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial loans - Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Wholesale Commercial Lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] \| Multi Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	302
Financing Receivables, 60 to 89 Days Past Due [Member] \| One To Four Family Residential Real Estate Loans Non Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	15
Financing Receivables, 60 to 89 Days Past Due [Member] \| One to Four Family Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	340
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial Leases Investment Rated [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	760	842
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial Loans Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial Loans Health Care [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	47
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial Loans Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial loans - unsecured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial loans - Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	288	288
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Wholesale Commercial Lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| Multi Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| One To Four Family Residential Real Estate Loans Non Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] \| One to Four Family Residential Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded Investment, Total Past Due	$ 472	$ 507

Loans Receivable - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 12,465	$ 5,103
Financing Receivable Credit Quality Indicators
Total loans	1,154,892	1,174,728
One-to-four family residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,129	1,624
Financing Receivable Credit Quality Indicators
Total loans	52,849	55,750
One to Four Family Residential Real Estate Loans-Owner occupied [Member] [Member]
Financing Receivable Credit Quality Indicators
Total loans	42,780	44,989
One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	131	295
Financing Receivable Credit Quality Indicators
Total loans	10,069	10,761
Multi-family mortgage loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,258	1,283
Financing Receivable Credit Quality Indicators
Total loans	542,421	563,750
Multi Family Mortgage Loans without wholesale [Member] [Member]
Financing Receivable Credit Quality Indicators
Total loans	234,662	247,963
Wholesale commercial lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivable Credit Quality Indicators
Total loans	307,759	315,787
Nonresidential Real Estate Loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	133,432	134,674
Commercial loans - Secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivable Credit Quality Indicators
Total loans	23,704	24,853
Commercial Loans - Municipal loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivable Credit Quality Indicators
Total loans	79,539	50,431
Commercial Loans - Warehouse Lines [Member]
Financing Receivable Credit Quality Indicators
Total loans
Commercial Loans - Health Care [Member]
Financing Receivable Credit Quality Indicators
Total loans	54,806	70,430
Commercial loans - other [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	4,536	679
Financing Receivable Credit Quality Indicators
Total loans	141,612	138,790
Commercial Leases - Investment Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	5,109	873
Financing Receivable Credit Quality Indicators
Total loans	124,451	133,839
Consumer loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	2,078	2,211
Nonaccrual [Member]
Financing Receivable Credit Quality Indicators
Total loans	764	800
Nonaccrual [Member] \| One-to-four family residential real estate loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	476	512
Nonaccrual [Member] \| One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] \| Multi-family mortgage loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] \| Wholesale commercial lending [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] \| Nonresidential Real Estate Loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	288	288
Nonaccrual [Member] \| Commercial loans - Secured [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] \| Commercial Loans - Municipal loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] \| Commercial Loans - Health Care [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] \| Commercial loans - other [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] \| Commercial Leases - Investment Rated [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Nonaccrual [Member] \| Consumer loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Substandard [Member]
Financing Receivable Credit Quality Indicators
Total loans	1,961	1,053
Substandard [Member] \| One-to-four family residential real estate loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	406	533
Substandard [Member] \| One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	34	35
Substandard [Member] \| Multi-family mortgage loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	206
Substandard [Member] \| Wholesale commercial lending [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Substandard [Member] \| Nonresidential Real Estate Loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	89	90
Substandard [Member] \| Commercial loans - Secured [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Substandard [Member] \| Commercial Loans - Municipal loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Substandard [Member] \| Commercial Loans - Health Care [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Substandard [Member] \| Commercial loans - other [Member]
Financing Receivable Credit Quality Indicators
Total loans	1,423	136
Substandard [Member] \| Commercial Leases - Investment Rated [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Substandard [Member] \| Consumer loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	9	53
Pass [Member]
Financing Receivable Credit Quality Indicators
Total loans	1,150,634	1,163,028
Pass [Member] \| One-to-four family residential real estate loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	41,815	43,908
Pass [Member] \| One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	10,006	10,696
Pass [Member] \| Multi-family mortgage loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	234,662	247,757
Pass [Member] \| Wholesale commercial lending [Member]
Financing Receivable Credit Quality Indicators
Total loans	307,759	315,787
Pass [Member] \| Nonresidential Real Estate Loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	132,894	134,134
Pass [Member] \| Commercial loans - Secured [Member]
Financing Receivable Credit Quality Indicators
Total loans	23,704	24,853
Pass [Member] \| Commercial Loans - Municipal loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	79,539	50,431
Pass [Member] \| Commercial Loans - Health Care [Member]
Financing Receivable Credit Quality Indicators
Total loans	53,863	62,084
Pass [Member] \| Commercial loans - other [Member]
Financing Receivable Credit Quality Indicators
Total loans	139,882	137,893
Pass [Member] \| Commercial Leases - Investment Rated [Member]
Financing Receivable Credit Quality Indicators
Total loans	124,451	133,332
Pass [Member] \| Consumer loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	2,059	2,153
Special Mention [Member]
Financing Receivable Credit Quality Indicators
Total loans	1,533	9,847
Special Mention [Member] \| One-to-four family residential real estate loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	83	36
Special Mention [Member] \| One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	29	30
Special Mention [Member] \| Multi-family mortgage loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Special Mention [Member] \| Wholesale commercial lending [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Special Mention [Member] \| Nonresidential Real Estate Loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	161	162
Special Mention [Member] \| Commercial loans - Secured [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Special Mention [Member] \| Commercial Loans - Municipal loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	0
Special Mention [Member] \| Commercial Loans - Health Care [Member]
Financing Receivable Credit Quality Indicators
Total loans	943	8,346
Special Mention [Member] \| Commercial loans - other [Member]
Financing Receivable Credit Quality Indicators
Total loans	307	761
Special Mention [Member] \| Commercial Leases - Investment Rated [Member]
Financing Receivable Credit Quality Indicators
Total loans	0	507
Special Mention [Member] \| Consumer loans [Member]
Financing Receivable Credit Quality Indicators
Total loans	10	5
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	11,255	3,431
Financing Receivables, 30 to 59 Days Past Due [Member] \| One-to-four family residential real estate loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	657	777
Financing Receivables, 30 to 59 Days Past Due [Member] \| One-to-four family residential real estate loans - non-owner occupied loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	131	280
Financing Receivables, 30 to 59 Days Past Due [Member] \| Multi-family mortgage loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,258	981
Financing Receivables, 30 to 59 Days Past Due [Member] \| Wholesale commercial lending [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial loans - Secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial Loans - Municipal loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial loans - other [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	4,093	543
Financing Receivables, 30 to 59 Days Past Due [Member] \| Commercial Leases - Investment Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 5,109	$ 826

Fair Value - Financial Assets Accounted for at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule of Company's financial instruments measured at fair values
Total Fair value	$ 63,853	$ 60,193
Certificates of deposit [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	53,234	48,666
Residential Mortgage Backed Securities [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	7,299	8,037
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	7,299
Collateralized Debt Obligations [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	2,809	2,977
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	2,809
Municipal Bonds [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	511	513
Nonrecurring [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	63,853	60,193
Nonrecurring [Member] \| Certificates of deposit [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	53,234	48,666
Nonrecurring [Member] \| Mortgage-backed securities - residential [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	7,299	8,037
Nonrecurring [Member] \| Collateralized mortgage obligations - residential [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	2,809	2,977
Nonrecurring [Member] \| Municipal Securities [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	511	513
Nonrecurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0	0
Nonrecurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Certificates of deposit [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0	0
Nonrecurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Mortgage-backed securities - residential [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0	0
Nonrecurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Collateralized mortgage obligations - residential [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0	0
Nonrecurring [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Municipal Securities [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0	0
Nonrecurring [Member] \| Significant Observable Inputs (Level 2) [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	63,853	60,193
Nonrecurring [Member] \| Significant Observable Inputs (Level 2) [Member] \| Certificates of deposit [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	53,234
Nonrecurring [Member] \| Significant Observable Inputs (Level 2) [Member] \| Mortgage-backed securities - residential [Member]
Schedule of Company's financial instruments measured at fair values
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	7,299
Nonrecurring [Member] \| Significant Observable Inputs (Level 2) [Member] \| Collateralized mortgage obligations - residential [Member]
Schedule of Company's financial instruments measured at fair values
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	2,809
Nonrecurring [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0	0
Nonrecurring [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Certificates of deposit [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0	0
Nonrecurring [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Mortgage-backed securities - residential [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0	0
Nonrecurring [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Collateralized mortgage obligations - residential [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	0	0
Nonrecurring [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Municipal Securities [Member]
Schedule of Company's financial instruments measured at fair values
Total Fair value	$ 0	$ 0